オープン ソースのパーティクル エンジン テストを SDL から SDL + OpenGL に移植する作業を行っています。コンパイルして実行することはできましたが、何をしても画面は黒いままです。main.cpp:
#include "glengine.h"
int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{
//Create a glengine instance
ultragl::glengine *gle = new ultragl::glengine();
if(gle->init())
gle->run();
else
std::cout << "glengine initializiation failed!" << std::endl;
//If we can't initialize, or the lesson has quit we delete the instance
delete gle;
return 0;
};
glengine.h:
//we need to include window first because GLee needs to be included before GL.h
#include "window.h"
#include <math.h> // Math Library Header File
#include <vector>
#include <stdio.h>
using namespace std;
namespace ultragl
{
class glengine
{
protected:
window m_Window; ///< The window for this lesson
unsigned int m_Keys[SDLK_LAST]; ///< Stores keys that are pressed
float piover180;
virtual void draw();
virtual void resize(int x, int y);
virtual bool processEvents();
void controls();
private:
/*
* We need a structure to store our vertices in, otherwise we
* just had a huge bunch of floats in the end
*/
struct Vertex
{
float x, y, z;
Vertex(){}
Vertex(float x, float y, float z)
{
this->x = x;
this->y = y;
this->z = z;
}
};
struct particle
{
public :
double angle;
double speed;
Vertex v;
int r;
int g;
int b;
int a;
particle(double angle, double speed, Vertex v, int r, int g, int b, int a)
{
this->angle = angle;
this->speed = speed;
this->v = v;
this->r = r;
this->g = g;
this->b = b;
this->a = a;
}
particle()
{
}
};
particle p[500];
float particlesize;
public:
glengine();
~glengine();
virtual void run();
virtual bool init();
void glengine::test2(int num);
void glengine::update();
};
};
window.h:
#include <string>
#include <iostream>
#include "GLee/GLee.h"
#include <SDL/SDL.h>
#include <SDL/SDL_opengl.h>
#include <GL/glu.h>
using namespace std;
namespace ultragl
{
class window
{
private:
int w_height;
int w_width;
int w_bpp;
bool w_fullscreen;
string w_title;
public:
window();
~window();
bool createWindow(int width, int height, int bpp, bool fullscreen, const string& title);
void setSize(int width, int height);
int getHeight();
int getWidth();
};
};
glengine.cpp (注目すべき主なもの):
#include "glengine.h"
namespace ultragl{
glengine::glengine()
{
piover180 = 0.0174532925f;
}
glengine::~glengine()
{
}
void glengine::resize(int x, int y)
{
std::cout << "Resizing Window to " << x << "x" << y << std::endl;
if (y <= 0)
{
y = 1;
}
glViewport(0,0,x,y);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f,(GLfloat)x/(GLfloat)y,1.0f,100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
bool glengine::processEvents()
{
SDL_Event event;
while (SDL_PollEvent(&event))//get all events
{
switch (event.type)
{
// Quit event
case SDL_QUIT:
{
// Return false because we are quitting.
return false;
}
case SDL_KEYDOWN:
{
SDLKey sym = event.key.keysym.sym;
if(sym == SDLK_ESCAPE) //Quit if escape was pressed
{
return false;
}
m_Keys[sym] = 1;
break;
}
case SDL_KEYUP:
{
SDLKey sym = event.key.keysym.sym;
m_Keys[sym] = 0;
break;
}
case SDL_VIDEORESIZE:
{
//the window has been resized so we need to set up our viewport and projection according to the new size
resize(event.resize.w, event.resize.h);
break;
}
// Default case
default:
{
break;
}
}
}
return true;
}
bool glengine::init()
{
srand( time( NULL ) );
for(int i = 0; i < 500; i++)
p[i] = particle(0, 0, Vertex(0.0f, 0.0f, 0.0f), 0, 0, 0, 0);
if (!m_Window.createWindow(640, 480, 32, false, "Paricle Test GL"))
{
return false;
}
particlesize = 0.01;
glShadeModel(GL_SMOOTH); // Enable Smooth Shading
glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background
glClearDepth(1.0f); // Depth Buffer Setup
glEnable(GL_DEPTH_TEST); // Enables Depth Testing
glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do
glEnable(GL_BLEND);
glBlendFunc(GL_ONE , GL_ONE_MINUS_SRC_ALPHA);
return true;
}
void glengine::test2(int num)
{
glPushMatrix();
glTranslatef(p[num].v.x, p[num].v.y, p[num].v.z);
glBegin(GL_QUADS);
glColor4i(p[num].r, p[num].g, p[num].b, p[num].a); // Green for x axis
glVertex3f(-particlesize, -particlesize, particlesize);
glVertex3f( particlesize, -particlesize, particlesize);
glVertex3f( particlesize, particlesize, particlesize);
glVertex3f(-particlesize, particlesize, particlesize);
glEnd();
glPopMatrix();
}
void glengine::draw()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer
glLoadIdentity(); // Reset The Current Modelview Matrix
gluLookAt(0, 5, 20, 0, 0, 0, 0, 0, 0);
for(int i = 0; i < 500; i++)
test2(i);
}
void glengine::update()
{
for(int i = 0; i < 500; i++)
{
if(p[i].a <= 0)
p[i] = particle(5 + rand() % 360, (rand() % 10) * 0.1, Vertex(0.0f, 0.0f, 0.0f), 0, 255, 255, 255);
else
p[i].a -= 1;
p[i].v.x += (sin(p[i].angle * (3.14159265/180)) * p[i].speed);
p[i].v.y -= (cos(p[i].angle * (3.14159265/180)) * p[i].speed);
}
}
void glengine::run()
{
while(processEvents())
{
update();
draw();
SDL_GL_SwapBuffers();
}
}
};
そして最後に window.cpp:
#include "window.h"
namespace ultragl
{
window::window(): w_width(0), w_height(0), w_bpp(0), w_fullscreen(false)
{
}
window::~window()
{
SDL_Quit();
}
bool window::createWindow(int width, int height, int bpp, bool fullscreen, const string& title)
{
if( SDL_Init( SDL_INIT_VIDEO ) != 0 )
return false;
w_height = height;
w_width = width;
w_title = title;
w_fullscreen = fullscreen;
w_bpp = bpp;
//Set lowest possiable values.
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
//Set title.
SDL_WM_SetCaption(title.c_str(), title.c_str());
// Flags tell SDL about the type of window we are creating.
int flags = SDL_OPENGL;
if(fullscreen == true)
flags |= SDL_FULLSCREEN;
// Create window
SDL_Surface * screen = SDL_SetVideoMode( width, height, bpp, flags );
if(screen == 0)
return false;
//SDL doesn't trigger off a ResizeEvent at startup, but as we need this for OpenGL, we do this ourself
SDL_Event resizeEvent;
resizeEvent.type = SDL_VIDEORESIZE;
resizeEvent.resize.w = width;
resizeEvent.resize.h = height;
SDL_PushEvent(&resizeEvent);
return true;
}
void window::setSize(int width, int height)
{
w_height = height;
w_width = width;
}
int window::getHeight()
{
return w_height;
}
int window::getWidth()
{
return w_width;
}
};
とにかく、本当にこれを終わらせる必要がありますが、考えられることはすべて試しました。私は glengine ファイルをさまざまな方法でテストして、ある時点で次のように見えました。
#include "glengine.h"
#include "SOIL/SOIL.h"
#include "SOIL/stb_image_aug.h"
#include "SOIL/image_helper.h"
#include "SOIL/image_DXT.h"
namespace ultragl{
glengine::glengine()
{
piover180 = 0.0174532925f;
}
glengine::~glengine()
{
}
void glengine::resize(int x, int y)
{
std::cout << "Resizing Window to " << x << "x" << y << std::endl;
if (y <= 0)
{
y = 1;
}
glViewport(0,0,x,y);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f,(GLfloat)x/(GLfloat)y,1.0f,1000.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
bool glengine::processEvents()
{
SDL_Event event;
while (SDL_PollEvent(&event))//get all events
{
switch (event.type)
{
// Quit event
case SDL_QUIT:
{
// Return false because we are quitting.
return false;
}
case SDL_KEYDOWN:
{
SDLKey sym = event.key.keysym.sym;
if(sym == SDLK_ESCAPE) //Quit if escape was pressed
{
return false;
}
m_Keys[sym] = 1;
break;
}
case SDL_KEYUP:
{
SDLKey sym = event.key.keysym.sym;
m_Keys[sym] = 0;
break;
}
case SDL_VIDEORESIZE:
{
//the window has been resized so we need to set up our viewport and projection according to the new size
resize(event.resize.w, event.resize.h);
break;
}
// Default case
default:
{
break;
}
}
}
return true;
}
bool glengine::init()
{
srand( time( NULL ) );
for(int i = 0; i < 500; i++)
p[i] = particle(0, 0, Vertex(0.0f, 0.0f, 0.0f), 0, 0, 0, 0);
if (!m_Window.createWindow(640, 480, 32, false, "Paricle Test GL"))
{
return false;
}
particlesize = 10.01;
glShadeModel(GL_SMOOTH); // Enable Smooth Shading
glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background
glClearDepth(1.0f); // Depth Buffer Setup
glEnable(GL_DEPTH_TEST); // Enables Depth Testing
glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do
glEnable(GL_BLEND);
glBlendFunc(GL_ONE , GL_ONE_MINUS_SRC_ALPHA);
return true;
}
void glengine::test2(int num)
{
//glPushMatrix();
//glTranslatef(p[num].v.x, p[num].v.y, p[num].v.z);
glColor4i(255, 255, 255, 255);
glBegin(GL_QUADS);
glNormal3f( 0.0f, 0.0f, 1.0f);
glVertex3f(-particlesize, -particlesize, particlesize);
glVertex3f( particlesize, -particlesize, particlesize);
glVertex3f( particlesize, particlesize, particlesize);
glVertex3f(-particlesize, particlesize, particlesize);
glEnd();
// Back Face
glBegin(GL_QUADS);
glNormal3f( 0.0f, 0.0f,-1.0f);
glVertex3f(-particlesize, -particlesize, -particlesize);
glVertex3f(-particlesize, particlesize, -particlesize);
glVertex3f( particlesize, particlesize, -particlesize);
glVertex3f( particlesize, -particlesize, -particlesize);
glEnd();
// Top Face
glBegin(GL_QUADS);
glNormal3f( 0.0f, 1.0f, 0.0f);
glVertex3f(-particlesize, particlesize, -particlesize);
glVertex3f(-particlesize, particlesize, particlesize);
glVertex3f( particlesize, particlesize, particlesize);
glVertex3f( particlesize, particlesize, -particlesize);
glEnd();
// Bottom Face
glBegin(GL_QUADS);
glNormal3f( 0.0f,-1.0f, 0.0f);
glVertex3f(-particlesize, -particlesize, -particlesize);
glVertex3f( particlesize, -particlesize, -particlesize);
glVertex3f( particlesize, -particlesize, particlesize);
glVertex3f(-particlesize, -particlesize, particlesize);
glEnd();
// Right face
glBegin(GL_QUADS);
glNormal3f( 1.0f, 0.0f, 0.0f);
glVertex3f( particlesize, -particlesize, -particlesize);
glVertex3f( particlesize, particlesize, -particlesize);
glVertex3f( particlesize, particlesize, particlesize);
glVertex3f( particlesize, -particlesize, particlesize);
glEnd();
// Left Face
glBegin(GL_QUADS);
glNormal3f(-1.0f, 0.0f, 0.0f);
glVertex3f(-particlesize, -particlesize, -particlesize);
glVertex3f(-particlesize, -particlesize, particlesize);
glVertex3f(-particlesize, particlesize, particlesize);
glVertex3f(-particlesize, particlesize, -particlesize);
glEnd();
//glPopMatrix();
}
void glengine::draw()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer
glLoadIdentity(); // Reset The Current Modelview Matrix
gluLookAt(0, 5, 20, 0, 0, 0, 0, 1, 0);
for(int i = 0; i < 500; i++)
test2(i);
}
void glengine::update()
{
for(int i = 0; i < 500; i++)
{
if(p[i].a <= 0)
p[i] = particle(5 + rand() % 360, (rand() % 10) * 0.1, Vertex(0.0f, 0.0f, -5.0f), 0, 255, 255, 255);
else
p[i].a -= 1;
p[i].v.x += (sin(p[i].angle * (3.14159265/180)) * p[i].speed);
p[i].v.y -= (cos(p[i].angle * (3.14159265/180)) * p[i].speed);
}
}
void glengine::run()
{
while(processEvents())
{
update();
draw();
SDL_GL_SwapBuffers();
}
}
};
それでもうまくいきませんでした。私は本当にこれで頭がいっぱいです。